This research has a purpose to find out the efficiency of of using education videos to increase the vocational high school students' mathematical communication ability. The method used for this research was a quasi experiment method where the researcher took two classes as research samples. The first class was the experimental class where the students were shown the education videos and the second class was the control class where the students were taught as usual. The materials which were used for this research was a linear program. The research's populations were the tenth grade students of SMK AL-Halim Garut with class X Multimedia and X Teknik Komputer dan Jaringan (TKJ) (Class of Computer Techniques and Network) as the samples. From the result of the first normality data analysis test (Pre-test), it was found that the experimental class did not distribute normally, therefore, the research continued by using Mann Whitney's experiment. Sig.0.456 > 0.05 was resulted from the count, therefore H0 was accepted, it meant that there was no difference between the experimental class and control class. Meanwhile, on the final test (Post-test), the scores of both classes did not distribute normally, therefore Mann Whitney's experiment was used again to find out. Sig.0.000 > 0.05 was resulted from the count, therefore H0 was rejected. In conclusion, "The efficiency of the students' mathematical communication ability who got the education videos was more effective than those who were taught as usual on the linear program material" Keywords: education videos, mathematical communication ability, linear program AbstrakPenelitian ini bertujuan untuk mengetahui efektivitas penggunaan video pembelajaran untuk meningkatkan kemampuan komunikasi matematik siswa SMK. Metode penelitian ini adalah kuasi eksperimen, dimana peneliti mengambil dua kelas sebagai sampel penelitan, yaitu kelas pertama sebagai kelas eksperimen mendapatkan video pembelajaran dan kelas kedua sebagai kelas kontrol mendapatkan pembelajaran biasa. Materi yang digunakan dalam penelitian ini adalah program linear. Populasi pada penelitian ini adalah seluruh siswa kelas X SMK AL-HALIM Garut dengan sampel kelas yang dipilih yaitu X Multimedia dan X Teknik computer dan jaringan (TKJ). Dari hasil uji normalitas analisis data tes awal (Pretest), diperoleh bahwa skor tes awal pada kelompok eksperimen tidak berdistribusi normal, maka pengujiannya dilanjutkan dengan uji Mann Whitney, Dari perhitungan diperoleh nilai sig.0.456 ≥ 0.05 maka H0 diterima, artinya kelas eksperimen dan kelas Zakiah, Saomi, Syara, Hidayat, Hendriana. (2018) The Linear Program Material As Observed In Vocational High School Students' Mathematical Communication Ability. JEE, 1 (1),[11][12][13][14][15][16][17][18] kontrol tidak terdapat perbedaan. Sedangkan pada tes akhir (Posttest) diperoleh skor kedua kelompok tidak berdistribusi normal, maka pengujiannya dilanjutkan dengan uji Mann Whitney. Dari perhitungan diperoleh sig.0.000 < 0.05 maka H0 ditolak. Jadi dapat disimpulkan bahwa "Efektiv...

This research is motivated by the low ability of understanding vocational students. This study will examine the improvement of students' mathematical understanding ability using discovery learning with the usual approach. The method used is the experimental method with the design of pretest-posttest control groups, namely designs that involve at least two groups and random sampling of classes. At the beginning and end of the study both classes are given a test. The population in this sample are all vocational high school students whose characteristics have low mathematical comprehension ability. Of all vocational schools randomly selected and selected Cimahi IT Development Vocational Schools representing the characteristics of the population. The sample was chosen randomly, where class XI RPL C became the experimental class, and class XI TEI B became the control class. Collecting data in this study using a description test that has been tested beforehand, then the scores of students' mathematical comprehension ability were analyzed with descriptive and inferential statistics using two average difference tests. Based on the results of the study, both data analysis and hypothesis testing, with α = 0.05, it was found that the improvement of students' mathematical understanding ability using discovery learning was better than students who used the usual approach, as well as the achievement of better understanding abilities. Keywords:  understanding, discovery learning.